Opening for Senior Java Backend Engineer

Position Overview:

We are seeking a highly experienced Senior Java Backend Engineer with 15+ years of relevant experience in designing, developing and operating high-performance enterprise backend systems. The ideal candidate will have deep expertise in Java 17+, Spring Boot 3.x, PostgreSQL, Redis, microservices and event-driven architecture.

The role involves owning the backend of a high-volume enterprise platform responsible for receiving, validating, storing and processing millions of transactions per month while maintaining strict data integrity, complete audit trails and low latency. Candidates must have hands-on experience designing, building and operating production systems at this scale and be able to explain performance bottlenecks, scalability challenges and the solutions implemented.

This position requires on-site work in Dubai, UAE, for a minimum period of six months.

Key Responsibilities:

Backend Service Design & Development

• Design, develop and maintain scalable Spring Boot microservices with clear domain boundaries and well-defined service responsibilities.
• Implement strict input validation, consistent error handling using RFC 7807-style responses and reliable transactional behaviour.
• Ensure business rules, data integrity and validation are enforced at the backend level.
• Build and maintain production-grade services capable of processing millions of transactions per month.

Database Design & Optimisation

• Design and maintain PostgreSQL schemas for high-volume transactional systems.
• Implement effective indexing, table partitioning and query optimisation strategies.
• Analyse and optimise database queries using EXPLAIN and performance profiling techniques.
• Manage database migrations, transaction isolation, connection pooling and zero-downtime schema changes.
• Maintain reliable performance for databases containing hundreds of millions of rows.

Caching & Distributed Coordination

• Implement Redis for caching, idempotency keys, rate limiting and distributed coordination.
• Design and manage distributed locks, queue or stream patterns and hot-path lookups.
• Define caching strategies, eviction policies, consistency requirements and failure-handling mechanisms.
• Monitor Redis performance, memory usage, persistence and clustering behaviour.

Event-Driven Processing & Messaging

• Develop reliable asynchronous processing pipelines using Kafka, RabbitMQ, Azure Service Bus, Redis Streams or equivalent technologies.
• Implement outbox patterns, retry mechanisms and dead-letter handling.
• Prevent transaction loss and duplication through reliable message-processing and idempotency strategies.
• Apply event sourcing, CQRS or append-only ledger patterns where appropriate.

API Development & Integration

• Design and maintain secure, versioned REST APIs using OpenAPI-first development practices.
• Integrate backend services with Flutter applications, API gateways, middleware and external partner systems.
• Work with WSO2, Kong, Azure API Management or equivalent integration platforms.
• Implement OAuth2, OpenID Connect, webhook integrations and secure partner communication.
• Maintain consistent API contracts, authentication and authorisation mechanisms.

Reliability, Monitoring & Performance

• Implement structured logging, metrics and distributed tracing across backend services.
• Define service-level objectives (SLOs) and support production reliability initiatives.
• Conduct load testing, capacity planning and performance optimisation.
• Diagnose production issues using telemetry and monitoring tools.
• Participate in incident response and improve service resilience in Microsoft Azure environments.

Security & Audit Management

• Implement role-based access control and secure authentication and authorisation mechanisms.
• Maintain reliable audit trails and robust data-integrity controls.
• Apply secure secrets management and appropriate security controls for regulated environments.
• Follow secure coding practices, including relevant OWASP recommendations.

Testing & Quality Assurance

• Develop unit, integration and contract tests for backend services.
• Participate in rigorous code reviews and enforce engineering quality standards.
• Provide reproducible test environments, fixtures and documentation for functional and performance testing teams.
• Ensure backend services meet reliability, security and performance requirements.

Technical Leadership & Collaboration

• Lead technical discussions and contribute to backend architecture decisions.
• Document architecture decision records (ADRs), technical designs and functional specifications.
• Mentor engineers and promote clean code, maintainability and engineering best practices.
• Collaborate with cross-functional teams to deliver scalable and reliable enterprise solutions.

Must-Have Skills & Experience

• Experience: 15+ years of relevant professional experience in software engineering, with demonstrable hands-on ownership of production Java backend systems processing millions of transactions per month or more.
• Java & Spring Boot: Strong expertise in Java 17+, Spring Boot 3.x, Spring Data JPA, Hibernate, Spring Security, Spring Cache, Bean Validation and Spring Boot Actuator.
• Java Fundamentals: Strong understanding of concurrency, memory management, multithreading and JVM performance tuning.
• PostgreSQL: Advanced expertise in database schema design, indexing, partitioning, EXPLAIN-driven query optimisation, transaction isolation and connection pooling.
• Redis: Production experience with caching, idempotency, distributed locks, Redis Streams, persistence, clustering and failure scenarios.
• Messaging & Asynchronous Processing: Hands-on experience with Kafka, RabbitMQ, Azure Service Bus, Redis Streams or equivalent technologies.
• Event-Driven Architecture: Understanding of event sourcing, CQRS, outbox patterns and reliable asynchronous processing.
• API Development: Expertise in REST APIs, OpenAPI specifications, API versioning, OAuth2, OIDC, webhooks and third-party integrations.
• API Gateways & Middleware: Experience with WSO2, Kong, Azure API Management or similar technologies.
• Cloud & DevOps: Practical experience with Microsoft Azure, Docker, Kubernetes, CI/CD pipelines and infrastructure-as-code.
• Monitoring & Observability: Experience with Prometheus, Grafana, OpenTelemetry, ELK or Azure Monitor.
• Testing & Engineering Practices: Strong understanding of unit testing, integration testing, contract testing, code reviews and secure software development.
• Communication: Excellent written and verbal communication skills, with the ability to document technical decisions and collaborate with distributed teams.
• On-Site Availability: Willingness and availability to work on-site in Dubai, UAE, for a minimum of six months.

Nice to Have

• Experience in regulated industries such as healthcare, supply chain, fintech, government or other compliance-sensitive environments.
• Knowledge of structured-data standards such as EDI, HL7/FHIR or ISO 20022.
• Experience with WSO2 Enterprise Integrator, WSO2 API Manager or comparable middleware platforms.
• Familiarity with PostgreSQL extensions such as pgvector, PostGIS or TimescaleDB.
• Experience with read replicas, logical replication and large-scale database operations.
• Understanding of computer-system validation and audit requirements, including GAMP 5, 21 CFR Part 11, Annex 11 or ISO 27001 controls.

Experience: 15+ Years

Salary: As per company norms

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